w3resource

R Programming: Extract specific column from a data frame using column name

R Programming: Data frame Exercise-5 with Solution

Write a R program to extract specific column from a data frame using column name.

Sample Solution :

R Programming Code :

exam_data = data.frame(
name = c('Anastasia', 'Dima', 'Katherine', 'James', 'Emily', 'Michael', 'Matthew', 'Laura', 'Kevin', 'Jonas'),
score = c(12.5, 9, 16.5, 12, 9, 20, 14.5, 13.5, 8, 19),
attempts = c(1, 3, 2, 3, 2, 3, 1, 1, 2, 1),
qualify = c('yes', 'no', 'yes', 'no', 'no', 'yes', 'yes', 'no', 'no', 'yes')
)
print("Original dataframe:")
print(exam_data)
print("Extract Specific columns:")
result <- data.frame(exam_data$name,exam_data$score)
print(result)

Sample Output:

[1] "Original dataframe:"
        name score attempts qualify
1  Anastasia  12.5        1     yes
2       Dima   9.0        3      no
3  Katherine  16.5        2     yes
4      James  12.0        3      no
5      Emily   9.0        2      no
6    Michael  20.0        3     yes
7    Matthew  14.5        1     yes
8      Laura  13.5        1      no
9      Kevin   8.0        2      no
10     Jonas  19.0        1     yes
[1] "Extract Specific columns:"
   exam_data.name exam_data.score
1       Anastasia            12.5
2            Dima             9.0
3       Katherine            16.5
4           James            12.0
5           Emily             9.0
6         Michael            20.0
7         Matthew            14.5
8           Laura            13.5
9           Kevin             8.0
10          Jonas            19.0                         

R Programming Code Editor:



Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a R program to get the statistical summary and nature of the data of a given data frame.
Next: Write a R program to extract first two rows from a given data frame.

Test your Programming skills with w3resource's quiz.

What is the difficulty level of this exercise?